Mittler, Elmar. “Challenges in Digitisation - Paper Given in Honour of Esko Häkli, Helsinki, 23 November 2001”. LIBER Quarterly: The Journal of the Association of European Research Libraries 14, no. 3-4 (November 16, 2004). Accessed May 2, 2024. https://liberquarterly.eu/article/view/10373.